#231F42
Closest named color: Oxford Blue (#1B263B). oklch(26.4% 0.064 286.4), rgb(35, 31, 66).
Aa
White text reads best on this color (15.60:1).
About this color
#231F42 is a dark, muted purple. In OKLCH its lightness is 26%, its chroma 0.064 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.031 away. White text reads best on it, at 15.60:1.
| Hue family | Purples |
| Lightness | dark (26%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.60:1 |
Values
| HEX | #231F42 |
| RGB | rgb(35, 31, 66) |
| HSL | hsl(247, 36%, 19%) |
| OKLCH | oklch(26.4% 0.064 286.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #231F42 | 15.60:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #231F42 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #231F42 text on white | 15.60:1 | AAA | Lc 102.5 | Preferred for body text |
| #231F42 text on black | 1.34:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F4
oklch(88.5% 0.041 285.5)
-
Step 300
300
#BCBAF0
oklch(80.9% 0.076 286.3)
-
Step 400
400
#9B94E8
oklch(70.6% 0.121 286.7)
-
Step 500
500
#8478E1
oklch(63.1% 0.154 286.3)
-
Step 600
600
#6F5ECF
oklch(55.6% 0.168 286.5)
-
Step 700
700
#5D4DB3
oklch(49.1% 0.156 286.4)
-
Step 800
800
#4C4091
oklch(42.8% 0.129 286.4)
-
Step 900
900
#3F3774
oklch(37.8% 0.101 286.5)
-
Step 950
950 (this color)
#231F42
oklch(26.4% 0.064 286.4)
#231F42 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #112543 | 0.031 |
| Deuteranopia (no green cones) | #112341 | 0.029 |
| Tritanopia (no blue cones) | #1A262D | 0.054 |
| Achromatopsia (no color) | #242424 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231F42
#231F42
oklch(26.4% 0.064 286.4)
- #282600
#282600
oklch(26.2% 0.056 106.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #231F42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.031
- Dark #1B2431 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.049
- Jet #212529 ΔE 0.057
- Rich Black #0D1B2A ΔE 0.061
- Dark Indigo #1F0954 ΔE 0.063
- Gunmetal #293241 ΔE 0.065
- Dark Purple #35063E ΔE 0.066
Use #231F42 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.